Oil-burning heater



Feb. 1 1927. RUTTIMAN* ET AL OIL BURNING HEATER 4 Sheets-Sheet'l Filed Aufl. l5, 1925 Feb. 1 1927.

A. RUTTIMAN 4 ET AL OIL BURNING HEATER Filed Aug. 15, i925 4 Sheets-Sheet 2 Zvevzors Feb. 1, 192,7. 1,615,852

A. RUTTIMAN ET AL m v OIL BURNING HEATER Filed Aug. l5, 1925 4 Sheets-Sheet 5 Feb. 1 1927. l

i A. RUTTIMAN ET Al.

OIL BURNING HEATER Filed Aug. l5, 1925 4 Sheets-Sheet 4 TZ Vm/Ze, I

Patented Feb. 1, 1927.

nuire arras ALFRED RUTTMAN AND FRED E. WHITE, 0F GARDNER, MASSACHUSETTS, ASSGNGRS TO FLORENCE STOVE COMPANY, OF GARDNER, MASSACHUSETTS, A CORPORATION 0F MASSAGHSETTS.

OIL-BURNING HEATER.

Application led August 15, 1925. Serial No. 50,412.

rlhis invention pertains to oil burning heaters of the constant level type in which the burner comprises a vertically movable bowl adjustable to vary the intensity ofthe flame, our invention relating more particularly to means for so supporting the burner bowl and connecting the fuel supply conduit thereto as to permit the bowl to move freely and without encountering substantial frictional resistance, and to means for automatically adjusting the bowl to vary they intensity of the flame.

l/'Vhile primarily intended to apply to burners of the movable bowl type, certain features of the invention, especially those pertaining tothe automatic regulation2 may, it is contemplated, be found of utility in connection with burners having means other than an adjustable bowl for varying the intensity of the flame.

Vile are aware that the automatic regulation of gas and electrical heaters is common and that automatic regulation of oil burners of large capacity such as are used for heating industrial steam boilers and so forth has been attempted, but we are not aware of any successful application of automatic regulating means to oil stoves or heaters of small capacity, such for example as oil ranges, water heaters, and the like, intended for domestic use and whereby the height of the flame may be regulated automatically either to increase or to decrease ils intensity in accordance with the teinperatnre of the medium, for example air or water, being heated.

lli/"e are also aware of so-called automaticV regulators for small capacity stoves or heaters comprising springs, weights, or 4other energy storing means which are initially set by hand and thereafter automatically released 'to cut off the fuel supply or otherwise to extinguish the flame at the end of a predetermined time interval or whenthe medium` being heated reaches a predeterniined temperature but we wish to distinish our present invention from thelatter devices which we hold to be improperly termed regulators, since they serve merely to extinguish the flame and not progressively to vary its intensity in accordance with temperature tlunctuations in the medium being heated.

In furtherance of our object we provide for so supporting the burner bowl and for connecting the fuel supply conduit thereto that the bowl may move up and down with great ease and freedom, and we accomplish the automatic adj ustment ofthis freely movable bowl by the provision of a thermal motorY sensitively responsive to temperature fluctuations in the medium being heated and adapted` to generate sufficient mechanical force to move the burner bowl to produce the requisite variations in intensity of the flame. rlhus we may raise the temperature of the medium being heated to the desired degree and thereafter maintain it at such predetermined selected temperature Without substantial variation.

Moreover we so combine this automatic regulating means with the usual hand control as to permit alternative use of either type of regulation without interference of one with the other, but preterably provide that the automatic regulating means shall take control, if for any reason the manual regulation is neglected and in consequence there is danger that the medium being heated will be raised to too high a temperature. Preferably also we provide that if, when under automatic control, the flame be entirely extinguished, further automatic movement of the burner bowl shall thereupon terminate in order to prevent subsequent lowering of the bowl and flooding of the unlightod wick with oil.

`We find our invention to be particularly useful for regulating the heat of cooking ovens, domestic water supply tanks, yand so forth, and we have herein illustrated it by way of example as embodied in a heater associated with such a water tank, a two Lburner heater having been selected for description herein.

ln the drawings, l is a somewhat diagran'nnatic elevation to small scale showing the improved heater associated with a water supply tank having the usual supply and delivery connections;

Fig. 2 is a fragmentary vertical section to large scale substantially on the line 2-2 of Fig. 3 and showing details of the lower part of the heater;

Fig. 3 is a horizontal section substantially on the line 3-3 of Fig. 2;

nig.

Fig. 4 is a vertical section substantially on the line 4 4 of Fig. 3;

is a perspective view showing the dial plate and a portion of the automatic controlling mechanism;

Fig. 6 is a plan view partly ink section- Y the regulator housing;

Fig. l0 is a front elevation partly Vin sect-ion showing details of the regulating mechanism Fig. l-l is a fragmentary side elevation illustrating a moditled ari-rangement permitting positive downward movement 'of the burner bowl;A and' v Fig, l2 is a fragmentary side elevation oi a Apreferred form of control bar.

Referring to Fig. l ot' the drawings, the improvedheater is designated generally by the character H, while the water tank associated therewith is indicated at 'l'. This tanlr is furnished with the usual supply pipe l and with the outletpipe 2 which leads to the inleteend or" the heater. From the heater an outlet pipe 3 leads to a T 4 from one branch of which a pipe leads to the upper part of the tank T and from the other branch of which the delivery pipe 5 extends.

Referring more particularly to Figs. 2 and 3, theheater, which is here illustrated as having two burners, comprises a base 6 supported upon legs 7 and carrying the casing 8 which houses the regulating mechanism hereinafter to be described. The' casing 8 supports a ring 9 which in turn carries aheater drum l0 of any' usual construction.

rl"he pipev 2 leading' from the lower part ot the tank T is connected with a short section ll of pipe which passes through an Y opening in the rear wall of the casing 8 and which enters the lower part ot a iluid receptacle l2. This fluid receptacle is preierably relatively tall and narrow and is disposed substantially at the center of the heater. The upper' end oi this receptacle l2 is connected to the usual heat-ing coil or worm which is disposed within the upper part oin the drum l0 but which is not illustrated herein. The upper end ot' the coil or worm is connected to the delivery pipe 3.

lli/'hen the recept-adsl2 and the coil are subjected to the heat generated by the burners theV water contained therein is warmed and circulation started which causes the cold water from the lower partrot the tank to flow through the pipesfZ and ll into the lower part of the receptacle l2 and thence which forms a support i'or and encloses a portion oi" the regulator mechanism. This housing co 4iprises spaced side walls l5 and ri-'respectively a rear wall l5 and a short verticali front wall- 16a. The rear wall lo et this housing is connectedv by bolts i7 to the rear wall ot the casing tl.

il; braclt'et i8 is secured to the outer suri of the rear wall oi' the casing 8, prrrerably'by means ot the saine bolts 1T which attach the regula-'tor housing thereto.V This *t bracket i8 is provided with a` substantially horizontal arm which connected at its rear edge lat'the poi'ntl-Q to a substantially vertical leg 2O of the fuel supply conduit. Pret'- erably the bracket 18 secured to the leg 20 by spot welding, soldering or the like. rlhe' upper end oi the tubular leg supports the fuelsuppl-y reservoir 2l which is open thel top and which in turn supports au inverted fuel supply tanlt 22 from which the 'tuoi feeds by gravity to the reservoir 2l under the control el barometrie pressure.

The lower end ot the leg 20 is preferably closed by means el" removable plug 23 and from a 'point intern'iediatev the 'ends of the leg 2O a branch 9.4 extends toward the rear wall et thevv heater. This branch is united to a transversely extending pipe or tube 25 (Fig. 3) whichI maybe att-'ached to they 'rear wall 8 of the'ca'sing in any suitable manner.

rlhe 'opposite' side walls l5 and 1G of th regulator housing are provided with vertically spaced pairs ot bearing` openings 12o, 2? and 28, 22,-corresponding openings in the members l5, and lli being aligned with eachother. lhe'lierably th se openings are of key-hole shape, although this is not a necessary ieature.

iil link 30 is disposed at the outer side et' the wall l@ et the regulator housing andhas itsv rear end portion bent substantially at right angles to the main part thereof to toria an axle member 3l which extends through the aligned openings 2o in the walls l5 and 16. rt points near its engagement with the walls lo and 16, the axle member 3l is pret erably provided with outstanding luge convenient-ly formed by striking up the metal. rlhese lugs torni limiting stops to prevent withdrawal et the axle member from the housing after it has been assembled therewith. ln assembling the parts the axle 5l is so turned that these projections or lugs may be passed through the narrow portions or the key hole openings 26 and when the axle is l manner as the axle 3l.

bowls.

subsequently swung to its normal position these lugs are disposed adjacent to the circular portions of the openings so that an axle can not be accidentally withdrawn.

A second link 32 similar to the link 30 is disposed below the latter and is furnished with an axle member 32zL which extends through the openings 27 in the walls l5 and 16 and is retained in position in the same The links 30 and 32 are bent outwardly at their forward ends to provide axle members 33 and 34 respectively which are parallel to their corresponding axle members 3l and 321l respectively.

rhese axle members 33 and are journalled in vertically spaced openings in a vertically elongate bracket 35 to which there is rigidly secured a hollow legl 36 forming a part of the fuel supply conduit. lhe Lipper end of this leg` 36 is connected to and supports burner bowl 37 which may be of usual. construction and which in turn carries the usual chimney At the opposite side of the regulator housing links 39 and 40 (Fig. 4) similar to the links 30 and 32 are arranged. These links 39 and 40 are furnished with axle members 4l and 42 respectively which are journaled in the openings 28 and 29 respectively -of the side walls 15 and 16. The forward ends of the links 39 and 40 are bent outwardly to provide axle members 43 and 44, journalled in a bracket 45 which carries the tubular leg 46 supporting the other of the two burner The construction thus far described permits each burner bowl to rise and fall independently of the other, each bowl floating freely upon the outer ends of its pair of parallel supporting links.

In order to connect the fuel supply 25 to the leg 36 of the burner bowl without interfering to any substantial extent with the free rise and fall of the latter we. preferably employ a tubular link 47 (Fig. 6) having its opposite ends bent as best shown in Fig. 6 to lie substantially perpendicular to the body of the link and parallel with each other. rlhese bent portions are indicated at 48 and 49 respectively. The portion 48 passes through an axial opening in a cap 49 which closes the end of pipe 25 and through a packing ring 50, the inner end of the member 48 being outwardly flanged as indicated at 51. Similarly the member 49 of the link 47 passes through an axial opening in a. cap 52 which closes the end of a short tubular branch 5l extending outwardly from the leg 36 and through a packing ring within said cap, the inner end of the member 49 being outwardly flared at 54. The arrangement described provides a pivotal connection for each end of theI link 47, and this pivotal connection may readily be made oil-tight by means ofthe packing rings without imposing any substantial frictional restraint upon the movement of the burner bowl, particularly since by reason of the length of the link 47 only slight angular movement occurs at the packing joints. The leg 46 of theother burner bowl is likewise connected to the pipe 25 by means of a pivoted tubular link 55 (Fig. 3) also having packed joints at its ends.

lt is obvious that as links 30 and 32 are not pivoted in the same vert-ical plane as link 47 at the right hand end of each of these links as seen in Fig. 3, there will be a certain amount of necessary lost motion. This is small in any case due to the. lengths and relative position of the links, but it isy taken care of by providing the bearings at 26 and 27 with a loose tit. This same applies to the support for the other burner.

The walls l5 and 16 of the regulator housing are furnished with aligned openings 56 (Fig. 9) for the reception of a shaft 57. The ends of this shaft project outwardly beyond the side walls of the regulator housing and support respectively the rear ends of controlling levers 58 and 59. rlhese levers may swing freely in a vertical direction about the shaft 57 as an axis and are connected to the shaft 57 somewhat loosely so that they may swing to a limited extent in a horizontal direction. lhe levers 58 and 59 project forwardly beyond the front of the casing 8 and are furnished at their forward ends with handles 60 and 6l respectively.

rllhe forward wall of the casing 8 is furnished with an opening which is closed by means of a dial plate 62 (Fig. 5) preferably provided with a pair of forwardly projecting curved bosses 63 and 64. 'lhese bosses are provided with slots through which thel forward ends of the levers 58 and 59, respectively, project. Preferably each of these slots is of substantially inverted lll-shape and by swinging the corresponding lever horizontally it may be brought into alignment with either of the vertical legs of the correspending slot. Preferably one leg 67 of each slot is somewhat shorter than the other leg 68 thereof. The longer leg 68 of each slot receives its Vcorresponding lever while the burner bowl is under manual control and this longer leg is preferably furnished with a. series of ratchet teeth 69 at one or both of its edges extending substantially from top to bottom thereof. rhe shorter leg 67, which receives the end of the controlling lever when the burner bowl is under automatic controhis preferably furnished with one or more,I ratchet teeth 70 at. its upper part only, the lower part of this slot being smooth so that the lever may slide freely up and down therein.

Preferably the forward end of each of the control levers 58 and 59 is provided with a handle as above described, such handle (Fig.y

2) being slidable longitudinally of the corresponding lever but beingr limited in its outward movement by aI stop cap 610. The limer end or' this handle is furnished with aratchet engaging tooth or detent 611, and a spring 612 within the handleI tends to force the handle rearwardly so as tol engage 4this tooth or detent with the ratchet teeth ot vthe dial plate.

Each or' the leve-rs 58 and 59 is `lmnished respectively with anI elongate slot 72 tlirough which passes the corresponding' axle member or 44.: of the levers 32 and l0 respectively. The control levers 58' and 59 are thus connectedV tothe respective burner bowls and by raising and lowering the ends of tl'iese'leve'rs and bowls may correspondingly be adjusted.

For mam-ral adjustment ot the burner bowls the forward end of the corresponding leve-r is placed inthe long leg G8 of the slot in the dial plate and when the burner is to be lighted thel'ever is pushed down to its lonferinost position thus permittii ree flow of fuel into the bowl. Vall-ien t 1e burner has been lighted the lever may be raised up to a point indicated High on theV dial plate andv may beI allowed to remain in this posi tion so long as the maximum intensity et llamefis desired. F or decreasing the intensity o'i the flame the lever is raised gradually, thereby lifting the bowl and decreasing 'the fuel supply and when the lever reaches the upper end of the slot the 'fuel supply is substantially'cut oil and thetlame ispeziti'nguished. Preferably a rest 71 is 'provided tor holding the control lever in the ont position.

For automatically controlling the position of the burner when the 'lever engages the shorter leg 67 ont' the slot in the dial plate,

'we have provided a shaft 73 journal-led at its opposite ends in the side wal-ls l5 and 16 respectively of the regulator casing, and upon this shattwve mount a-tilting tram-e or lever 76 having spaced side members provided with openings 74E and '75 for the reception ot *thel shaft 73. The forward end of this tilting lever carries a transverse bar 7T disposed below the levers 58 and 59 and having its end portions disposed in the vertical planes of movement or said levers. Preferably 'the opposite ends of the Ibar 77 are ot stepped formation (Fig. 19) providing'surtaces 78 an-d'79 arrangedat different horizontal levels. T he surface 79' liesf in the plane ot movement ot the corresponding control lever when the latter is in thelong leg G8 of the slot in 'thedial plate lwhile the surtaceii'd liesjin the path otmoveinent or" the lever when the "latter is di-.iposed in the shorter leg of the slot.

Preferably the end poi "ons olE the bar carryingftlre low-er step' suA l Lces E 9 are bent to lie in aV plane'in front o'r the main body 'llie-loiver-end or" thereceptacle l2' proremesa vided with a screw-threaded opening which receives a threaded plugf89. The upper end l ot this plug is or reduced diameter and projects up through the bottom ot' the receptacle l2 and enters tie louer end oi a tube to which it is brazed or welded. This tube extends vertically up through the cenn ter of the receptacle l2 and is closed at its upper end by a plug 83.

The plug 89 forms a closure for the end er' a sylphon Se, the lower end oi which is closed by a plug lThis plug 85 is preferably' i'urnislied with a short tubular stop 86 disposed within the body of the sylphon and adapted to contact with the plug 89 to liniit contraction oi the sv phon.

upper rlhe plug is provided with a central boss to which a cap S7 is connected. "lhis cap is furnis-lied with a transverse pin 88 whose oppositoends entend through openings 89 and 99 in the sides ot the tilting frame 76, thus connecting the sylphon to sait. frame.

lhe sylphon Sli with the tube 82 constitutes a thermal motor which responds to tiiictuations in emperature in the ilu ll contained inthe receptacle l2 and by si n response tilts the levell 76 up and down, rl`lie tube is hereina'c er referred toas pressure generator and in assembling the apparatus Vthis tube is partly `illed with come highly volatile liquid, example ether, which responds very quickly to temperature changes in the surrounding fluid medium. rllhe enoansion or contraction of the vapor within the tube 82 produces mechanical movement of the, plug 85 since the sylphon is cap-able of expanding or contracting longitudinally and the mechanical force thus generated is sufficient to raise and lowerV the burner bowl.

The upward movement oft the plug S5 is limited `by engagement et vthe stop tube 86 Vwith the plug 80, such limitation of movey ment vbeing` desirable since the Weight ot the burner bowl tends to move the plug S5 upwardly.

rlhe downward movement ot the plug S5 is preferably limi-ted by means o1 a yielding stop. For this purpose a bridge. 91 is secured at its opposite ends to die 'side walls l5 and 19 of the regulator*housingand has a guide opening for a verticallyT sl' ling bar 93 having a head 95 at its i `,er end disposed in the path ot the lower d ol can 8?. A spring 96 is interposedbetween the head 95 and the upper surface oi" the bridge 91. This spring may be ten'sioned by means or' nut 92 so as to opposen'iore. or less resistance to the downward movement of the plug 85.

ln'F 7 oi the drawings a modified form ot fuel conduit is illustrated comprising the 'tubular link el 'whose opposite ends are connected respeetivelv tothe supply pipe 25 and a boss 5l, cari. t'iibythefleg 36 o the titl lll)

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burner bowl, by means of flexible tubular members 96a. `With this arrangement no joints whatever are necessary and since the fluid is nnder but slight pressure the tubular sections 96 may be made very pliable so that but little resistance is opposed to the movement of the burner bowl.

In Fig. 8 we have .shown'diagrammatically a somewhat modified arrangement of the controlling mechanism, the burner bowl bcing designated by the character 37b and its depending tubular leg by the character 36". The fuel reservoir 2lb is provided. with a conduit member 2&1 which is connected to the leg 36h by means of the link 17h having pivotal joints at 49h and 52"A at its opposite ends, such joints being of the same type as shown in Fig. G.

In this instance thelink 17h constitutes one of the supports for the burner bowl, the other support being provided by the controller lever 58b which is pivotally supported at its rear end at a point 97 directly below the joint i9". This lever 58b is pivotally connected at 08 to the lower end of the leg 36" directly below the `joint 52?. lts forward end is provided with a handle G0b and this lever may be engaged by a bar 77h actuated by a thermal motor 8a". This simpler construction eliminates the supporting links, since the burner bowl is supported .solely by the conduit member 47h and the controller lever 58h.

ln order that the burner bowl may be moved down positively by the thermal motor we provide the preferred arrangement shown in Fig. 11. In accordance with this arrangement a latch hook 100 is pivotally supported at 102 upon the lever 58. This latch hook is provided with a link 103 connecting it with the handle 60 and with a toe 101 adapted to engage an opening 104 in the cross bar 77. When thus engaged, downward movement of the cross bar positively pulls the lever 58 down and thus lowers the burner bowl. lhile this arrangement permits the thermal motor to be disconnected from the bowl by pullingl downwardly from the handle 00, we contemplate permanent connections between the bowl and the thermal motor as falling within the scope of our invention.

The operation of the device of Figs. 1 to 7 is substantially as follows, it beine; assumed that the right hand control lever 58 was placed at the lower end of the slot 58 while the burner was being lighted and has then been lifted and swung over intorthe slot (3'4". llhen the controller lever is located in the lower part of the slot 07, the flame is at its maximum working' intensity. As the water in `the system gradually b comes warmer, the enpansible fiuid in the tube 82 expands and pushes the plug 85 downwardly. As the plug' moves downwardly it swings the forward end of the frame 76 up until the surface 78 of the cross bar 77 comes into contact with the control lever 58. Further movement of the plug 85 downwardly thus swings the control lever upwardly .and raises the burner bowl. This decreases the fuel supply and cuts down the intensity of the flame. Ordinarily under such circumstances the water in the system will cease to rise in temperature and if its temperature begins to fall, then the contraction of the fluid within the tube 82, assisted by the weight of the burner bowl, tends to restore the latter to its lower position, thus again increasing the fuel supply and causing the flame to become hotter.

The range of movement of the lever 58 during such regulation takes place in the lower part of the slot 67 where there are no teeth 7 0 to interfere with its free movement. lowever, if, for example, when no water is being drawn from the system, the temperature of the water should continue to increase even after the bowl has been raised to the normal extent, the cont-rol lever will continue to rise until the fuel supply is entirely cut ofi' and the flame is extinguished. ln rising to this latter point the control lever enters that part of the slot 67 which is provided with teeth so that the dog (511 engages the teeth and prevent-s downward movement of the lever. As the water gradually cools and the plug` 85 rises, the bowl is maintained in its uppermost position by the dog 011 and thus flooding of the wick with oil is prevented vsuch as might take place were the bowl allowed to descend with the wick unlighted.

Since it is desirable to avoid complete extinguishment of the flame except under unusual circumstances, the adjustable .stop 98 is provided which opposes the further downward movement of the plug 85 at a certain deiinite point in the travel of the latter. rllhis stop 98 may be adjusted so as to determine the maximum rise of the bowl under ordinary circumstances thus preventing the fuel supply from being wholly cut ofi. However, as above pointed out, it may under some circumstances be desired to cnt off the llame entirely and for this reason the stop is made yieldalole so that when the pressure within the sylphon 84e exceeds a certain amount it will push. the stop downwardly and thus raise the bowl to the point necessary to extinguish the dame.

The movement of the burner bowl is nore mally under manual control when the "control lever occupies the slot VG8 but it soma times happens under such conditions that the user neglects to reduce the flame at the proper time so that the water tends to be come excessively hot, at the same time wast ing fuel. To prevent this from occurring the bar 77 is provided with the lower stop 79 which underlies the lever 58 when the latter is in the slot GS. During ordinary operation of the device the shoulder 79 is dis-- posed below the path or movement of the Ilever -58 so that it does not interfere with slot thus cutting;` down or wholly extinguishing` the name.

ln the preferred arrangen'lent ot Fig. 12, the surface 79 is so )far loi-ward of the surface 7S that it does not engage the lever 58 when positioned for lightingl and so that it will not shut oil' the llame too soon.

TVhile vthe operation `has herein been described with respect to control lever 58, it is to -be understood that the control 59 4is similarly actuated both manually and automatically. liloreover, while the mechanism has herein been shown as embodied in a twoburner ,heat-er, it is obvious that the same number of operations and substantially the same mechanism may be employed Vin a singie burner heater as wellas in one having a greater number of burners than that here shown. Furthermore we contemplate that in its broader features the invention is not necessarily limited to a burner having a movable bowl for controlling` the llame but it is applicable to other types ol llame oontrol and we contemplate that the invention may be employed in other specific constructions wherein Vequivalent devices are substituted for the elements herein disclosed.

l/Ve claim:

l. An oil burning heater of the class described comprising a burner ot the maintained oil level type having vertically movable bowl. a fixed vfuel reservoir, a pair of substantially parallel linlrs supporting and guiding thelbowl in Aits movement,v automatic meansresponsive to the temperature in :the

Y region of said burner for movingr the bowl up and down, whereby to vary the level ot the fuel therein and consequently to vary the intensity off combustion, and a fuel cond uit conneetinu'tho reservoir and bowl com- Qprising 'fixed end portions and a rigid median portion having' llexible connections with the end portions.

2. An `oil burning `heater ot the class described comprising a burner having a vertically movable bowl, a fixed fuel reservoir, a conduit comprising members rigidly united to the bowl and reservoir, respective# ly, a rigid tubular link `flexibly connected at its opposite ends to said rigid portions of the conduit, and vthermally responsive Ameans for automatically raising and lowering the bowl.

vbeati-rr of the class described havingV a ver 1,61 este scribed having a vertically movable burner fbowl, a fluid container so positioned relatively to the burner llame that its contents may be heated by the latter, said container having an inlet and an outlet, and a thermal motor comprising a pressure generator resgonsive to fluctuations in temperature of the fluid in the receptacle adjacent to the inlet thereof, said motor being connected to the bowl and adjusting` the latter in accordance with pressure variations in the generator, whereby the intensity of the flame of the burner is simultaneously varied.

l. In combination with an Aoil burningV heater ol the class described rhavingl a vertically adjustable burner bowl, a fluid heating` system comprising a receptacle so disposed relatively to the burner llame that its contents may be heated by the latter .and set intocirculation, and a thermal-motor having a pressure generatingI element disposed within said receptacle adjacent to the inlet or cold end thereot.l said motor being` connected tothe burner bowl and adjusting the position kot the-latter in accordance with vfluctuations in temperature of the fluid within the receptacle, whereby the intensity of the flame ot the burner is simultaneously varied.

5. ln combina ion with an oil burning heater of the class described having an adjustable burner bowl, a lluid heating tem comprising a. tall and narrow vertically disposed Huid receptacle exposed to the flame of the burnerv said receptacle having a cold fluid inlet near its lower end and a .hot fluid outlet near its upper end, and a thermal motor responsive to fluctuations in temperature in the fluid entering the inlet ot the receptacle and by such response adjusting the position of the burner bowl, Awhereby the intensity of the llame of the luirner is simultaneously varied.

6. ln combination with an oil burning heater of the class described havingy an adjustable burner bowl, a fluid heatingsystem comiiirising a tall and narrow vertically disposed lluid receptacle exposed to the flame or, the burner, said receptacle having' a cold l'luid inlet near its lower end and a hot` fluid outlet near its upper end, and a thermal motor comprising' a tubular pressure Arenerator cent-rally disposed in the lower part of lthe receptacle v-.nere the temperature et .the fluid is lowest and an etpansible member outside oli the receptacle but cor-.minnieating` with the generator and responding` to changes in pressure in the later, the motor being connected to the burner bowl and delurmining` the position ot the latter, whereby the intensity of the 1flame of the burner is simultaneously varied.

7. Regulating means for an oil bui-iin rio tieally movable burner bowl. said means comprising manually actuable controller .fifi

and a thermally actuated controller, said controllers being alternatively operable to raise or lower the bowl.

S. Regulating means for an oil burning heater ot the class described having a vertically adjustable burner bowl, said means comprising an element movable in response to tiuctnationsin temperature in the medium being heated, and a part connected to the bowl, said latter part being engageable with said movable element to transmit movements of the latter to the bowl, but being disengageable trom said elen'ient at will, and manual means tor adjusting the position of the bowl when the parts are disengaged.

9. Regulating means 'for oil burning heater of the class described having a ver tically adjustable burner bowl, said means comprising a member movable into a plurality ot positions, said member being connected to the burner bowl, and when in one ot said positions being niiovable manually to adjust the bowl, and an automatic con troller eltective in another position of said movable member to move the latter and thereby to raise or lower the bowl.

10. Regulating means 'tor an oil burning heater of the class described having a vertically adjustable burn-er bowl, said means comprising a thermal motor, an element movable thereby iuresponse to temperature lluctuations in the medium being heated, and amanually movable member for raising and lowering the burner bowl, said manually rmovable inen'iber being shiltable into and out ot' the path ot the element which is mov-ed by the thermal motor,

11. Regulating means for an oil burning heater of the class described having a vertically adjustable burner bowl, said means comprising a thermal motor, a lever con nected to said noter and tiltable thereby in response to 'fluctuations in temperature in theA medium being heated, and a manually movable member connected to the bowl for raising and lowering` the latter, said manuN ally movable member being shittable into and out ot the path of an elem-entcarried by the lever` said element, when in the path of the lever transmitting movement of the thermal element to the bowl.

12. Regulating means for an oil burning heater of the class described having a plurality ot burners each having a vertically u'iovable bowl, said means comprising a thermal motor responsive to temperature fluctuation in the medium being heater, and means tor transmitting motion from the motor to any or all ot said burner bowls at will whereby automatically to regulate the flame of the burner or burners to which such motion is transmitted.

13. Regulating means for an oil burning hea-ter ol: the class described having a pair oit spaced burners each having a vertically movable bowl, a thermal motor exposed to the medium heated by the burners and responsive to temperature fluctuations in suoli medium, a supporting member for each burner bowl, said supporting members being vertc-ally movable to raise or lower their respective bowls,l a transversely extending bar below said supporting members and means connecting the bar to the motor whereby movementof the latter may be transmitted to both of said levers.

14. Regulating means for an oil burning heater of the class described having a pair of spaced burners each having a vertically movable bowl, a thermal motor exposed to the medium heated by the burners and responsive to temperature fluctuations in such medium, a pair of spaced parallel levers, means connecting said levers respectively to the respective burner bowls, a handle `tor manually raising and lowering each lever with its bowl, a bar disposed below said lwers with its opposite end portions cxtending transversely across -the vertical planes of movement of the respective levers, and means connecting the bar to the thermal motor to be moved by the latter.

15. Regulating means for an oil burning heater of the class described having a vertically adjustable burner bowl, said means comprising a. thermal motor and a lever con nccted thereto, the motor responding to fluctuations in temperature in the medium being heated and thereby tilting the lever in one direction or the other, said lever having` a part provided with step-like surfaces, and a n'ieinber connected to the bowl for raising and lowering it, said member being positionable at will in the path or' movement o'l' `any selected one of said step-like surfaces.

16. Regulating means for an oil burning heater o't the class described having a pair of spaced burners each having a vertically movable bowl, a thermal motor exposed to the medium heat-ed by the burn-ers and responsive to temperature fluctuations in such medium, a pair of spaced parallel levers, means connecting said lev rs respectively to the respective burn-er bowls, a handle for n'ianually raising and lmvering each lever with its bowl, a bar disposed below said levers, said bar having step-like end surfaces, and means connecting the bar to the thermal motor 'for bodily n'iovcn'ieut by said motor, the levers beine' independently movable in a horizontal direction to dispose them respectively in position by cugagement by any selected one ot the stepdike surfaces oli the corrcspornling end ot the bar.

li", Regulating means for an oil burning motor of the class described having a vertically adjustable burner bowl, said means comprising a thermal motor and a lever connected thereto, the motors responding to lll5 fluctuations in temperature in the medium being heated and thereby tilting the lever in one direction or the other, .sa-id lever having a part provided with step-like surfaces, a bowl supporting lever provided with a handle, and means connecting the supporting` lever to the burner bowl, said supporting lever being movable in a vertical direction to raise or lower the bowl and being also movable in a. horizontal direction to position it in the path ot movement of a. selected one of said step-like surfaces.

1S. Regulating means lor an oil burning heater of the class described having a. vertically movable burner bowl, said means coinprising a manually actuable controller lor raising and lowering the bowl, and a thermal controller also adapt-edito raise and lower the bowl, said controllers normally operating altermitivelj-s, said automatic controller, whether the bowl be under manual or antomatic control, being operative. to raise the bowl to extinguish the llame when apredeter-mined temperature in the medium being heated is exceeded'.

19. Regulating means For an oil burning heater ot' the class described, having a burner provided with a vertically movable bowl,

a thermal motor exposed Vto the medium heated by theburner and responsive to temperaturev fluctuations in said medium, a vertically movable controller member provided with a handle, means connectiiig the burner bowl to the controller member', a dial plate having a slot of substantially inverted U- shape, the controller member passing through the slot and being` shittable laterally to.` engage either of the vertical legs of the slot, and' means engageable with the controller member, when disposed in one of thel legs o1 the slot, automatically to move the controller member up or down.

20. legulatino means lor' an oil burning heater ot the class described having a burner provided with a vertically movable bowl, a thermal .motor exposed' to the medium heated by the burner and responsive to temperature fluctuations in said medium, a vertically movable control-ler member provided with a handle, means connecting the burner bowl to the controller member, a dial plate having a slot of substantially inverted U-shape, the cont-roller member passing through the slot vand being shittable laterally to engage either ot the vertical Vlegs ot the slot, one ot said legs being longer than the other, the longer leg having ratchet teeth extending along the greater portion ot one ot its edges and the shorter leg havingA such teetn near its ujper part only, and automatic means tor raising and lowering the controller member when disposed in the shorter leg ot the slot.

2l. Regulating means lor an oil burning heater el the class described having a burner asienta provided with a vertically7 movable bowl, a thermal motor exposed to the medium heated by the burner and responsive to temperature fluctuations in said medium, a lever pivoted adjacent to one of its ends and adapted to swing in a vertical plane and also in a horizontal direction, means connecting the burner bowl to the lever at a point intermediate the ends ot the latter, a dial plate having a slot therethrough, said slot com` prising spaced parallel legs, the tree end of the lever projecting through the slot, a detent carried by the tree end ot the lever, ratchet teeth at one edge of one leg of the slot with which said detent may be engaged to retain the lever in selected elevated position` whereby normally to determine the position of the burner bowl, and automatically actuated means engageable with the lever when its- 'l'orward part is disposed in theother leg ot the slot to determine the position et the bowl in accordance with the temperature olil the medium being heated.

Regulating means tor an oil burning heater et the class described having a burner provided with a vertically movable bowl, a thermal motor exposed to the medium heated by the burner and responsive to temperature fluctuations in said medium, a lever pivoted adjacent to one ot its ends and adapted to swing in a verticalV plane and also in a horizontal direction, means connecting the burner bowl to the lever at a point intermediate the ends ot the latter, a dial plate having a slot therethrough of substantially inverted U-shape, the free end of the lever projecting through the slot, a handle slidably mounted on the forward end of the lever, said handle having a detent element at its inner end, ratchet teeth at the edge of one leg oi' the slot with which the detent element may be engaged to retain the lever in elevated position, and' a. thermal motor for moving the lever upv and down when the lever is disposed in the otherleg of the slot.

23. Regulating means for an oil burning heater of the class described having a burner movable to regulate the intensity ot the llame andr an element tor moving said burner, an automatic controller connected to said element tor moving thev latter to increasey or decrease the intensity of the flame, and means operative, when the flame has been extinguished by the action ol said controller, toloclr. said movable element in .fixed position.

2li. Regulating means tor an oil? burning heater ot the cl ss describedl having a burner provided with a vertically movable bowl, a thermal motor exposed to the medium heated by the burner and responsive to temperature fluctuations in said medium, a vertically movable controller member provided with a handle', means connecting the, burner bowl to the controller member, a dialr plate having a slot of substantially inverted U- shape, the controller member passing through the slot and being shiftable laterally to engage either of the vertical legs of the slot, means engageable with the controller member when disposed in one of the legs of the slot automatically to move the controller member up and down, and means engageable with said controller member when moved above a predetermined point to prevent its return to a lower position.

25. Regulating means for an oil burning heater of the class described having a burner provided with a vertically movable bowl, a thermal motor exposed to the medium heated by the burner and responsive to temperature fluctuations in said medium, a vertically movable controller member provided with a handle, means connecting the burner bowl to the controller member, a dial plate having a slot of substantially inverted U-shape, the controller member passing through the slot and being shi'ltable laterally to engage either of the vertical legs ot the slot, a thermal motor responsive to teinperature fluctuations in the medium being heated, means for transmitting movement from the motor to the controller member when the latter is disposed in one leg of the slot, said leg having ratchet teeth at one edge engageable with the controlling member when lit'ted to a predetermined degree to prevent its return to a lower position.

Q6. legulating means for an oil burning heater of the class described having a Inovable flame controlling element, automatic motive means for moving said element to increase or decrease theint-ensity of the flame, and stop means tending to limit movement of said element in reducing the intensity of the flame, said stop means yielding to insistence of said motive means and thereby permitting the element to move sufficiently completely to extinguish the flame.

27. Regulating means for an oil burning heater of the class described having a movable flame controlling element, said means comprising a thermal motor exposed to the medium heated by the burner and responsive to temperature fluctuations in said medium, means connecting the thermal motor to the flame controlling element, automatically to raise and lower the flame, and means opposing a substantial resistance to further movement of the motor when the flame has been reduced to a predetermined degree.

28. An oil burning heater of the class described having a vertically movable burner bowl, a thermal motor responsive to temperature fluctuations in the medium heated by the burner flame and by its response moving the bowl up or down, and an adjustable yielding stop normally operative to limit upward movement of the bowl but yielding to abnormal force exerted by the motor to permit the bowl to rise beyond said normal limit.

29. Regulating means for an oil burning heater of the class described having a movable flame controlling element, said means comprising a thermal motor exposed to the medium heated by the burner and responsive to temperature fluctuations in said medium, means connecting the thermal motor to the flame controlling element automatically to raise and lower the flame, and a resiliently yielding stop deviceA tending to stop further movement of the motor when the flame has been reduced to a predetermined degree, said stop yielding to permit subsequent further movement of the motor sufficient completely to extinguish the flame it the temperature of" the medium being heated fails to decrease responsive to such previous reduction of the flame.

Signed by us at Gardner, Massachusetts, this tenth day of August, 1925.

ALFRED RUTTIMAN. FRED E. WHITE. 

